Sen. Hillary Clinton is banking on a big win over Sen. Barack Obama in West Virginia's Democratic primary on Tuesday.

But even if Clinton does win in the few remaining states, she won't be able to pass Obama in the delegate count. The math is now nearly impossible to work out in her favor.

That's why many political analysts are saying Obama has essentially sealed up the Democratic nomination.

But the Clinton camp is still showing no signs of backing down, arguing that she's the best candidate to face Republican John McCain this fall.

"Hillary Clinton in the general election can beat John McCain," said Clinton Campaign Chairman Terry McAuliffe. "She beats him in Florida. She beats him in Ohio. She beats him in Missouri."

"She says 'full steam ahead,' but her problem is that she's running out of track," said David Gergen, former White House adviser to Presidents Nixon, Ford, Reagan and Clinton.

While campaigning in West Virginia on Mother's Day, Clinton quoted Eleanor Roosevelt, telling a crowd of supporters: "A woman is like a tea bag. You never know how strong she is until she is in hot water."

Obama to Florida, Michigan

Meanwhile, Obama's campaign on Monday announced he will visit Florida and Michigan. The Illinois senator is beginning to focus on a general election strategy.

It will be his first time in either state. He pledged last year not to campaign in the two states that violated national party rules with early primaries.

It will also give Obama a chance to build relationships in the two critical general election battlegrounds, if he wins the Democratic nomination.

The Obama campaign announced a five-state tour over the next two weeks that includes stops in remaining primary states South Dakota and Oregon.